This Patek Philippe reference 5924G is the Calatrava Pilot Travel Time Chronograph in white gold, the first time Patek Philippe has brought a chronograph to its aviation-styled Pilot line. Its appeal lies in the pairing of complications: a self-winding flyback chronograph alongside the Travel Time dual time zone, with a date that follows local time — a combination rooted in the pilot's watches Patek made in the 1930s. Driving it is the in-house automatic calibre CH 28-520 C FUS, a column-wheel chronograph with a vertical clutch. The 18k white gold case measures 42mm in height and width with a thickness of 13mm, broad and confident on the wrist as the style calls for. The sunburst blue-grey dial carries applied white gold numerals with luminous filling, twin day/night apertures and a chronograph counter at six.